add login/sign-up page with dark/light mode

prisma/schema.prisma

@@ -0,0 +1,16 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "mysql"
+  url      = env("DATABASE_URL")
+}
+
+model Task {
+  id          Int     @id @default(autoincrement())
+  task_name   String
+  time_needed Int
+  complexity  Int
+  check       Boolean
+}